Integrated aluminum shell cover plate

Abstract

The utility model belongs to the technical field of batteries, and provides an integrated aluminum shell cover plate which comprises a positive end cover, a negative end cover and an aluminum shell, a plurality of bosses formed by stamping are arranged on one end surface of the aluminum shell; mounting holes are formed in the surfaces of at least two bosses and are used for mounting a positive electrode end cover and a negative electrode end cover; at least one boss is used for mounting an anti-explosion valve; and at least one boss is used for mounting a liquid injection hole aluminum sheet. According to the utility model, the plurality of bosses are formed on the end face of the aluminum shell through stamping, and the space occupied by the explosion-proof valve and the liquid injection hole aluminum sheet is expanded outwards in the form of the bosses, so that the internal space of the aluminum shell is increased, and the mounting space of a stacked core or a rolled core is not influenced; the positive electrode end cover and the negative electrode end cover are arranged on one end face of the aluminum shell, so that the installation of a long tab is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and particularly relates to an integrated aluminum shell cover plate. Background Art

[0002] Due to the characteristics of high energy density, no memory effect, long single-cell cycle, high efficiency, cleanliness and pollution-free of lithium batteries, they have been widely used. The demand for high-capacity and high-rate charge and discharge of batteries in the energy storage industry and the power battery industry has increased sharply. However, many challenges are faced in the process of making the battery thicker. For example, how to assemble very thick electrode sheets together, and the increase in the manufacturing scrap rate caused by making the tab longer. Moreover, key components such as explosion-proof valves and liquid injection hole aluminum sheets are integrated on the battery shell, resulting in some space in the shell needing to be reserved, which in turn affects the installation space of the stacked core or wound core. Content of the Utility Model

[0003] In order to solve the problems in the background art, the utility model proposes an integrated aluminum shell cover plate.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An integrated aluminum shell cover plate includes a positive end cover, a negative end cover and an aluminum shell;

[0006] A plurality of bosses formed by stamping are arranged on one end face of the aluminum shell;

[0007] Installation holes are formed on the surfaces of at least two bosses, and the installation holes are used for installing the positive end cover and the negative end cover;

[0008] At least one boss is used for installing an explosion-proof valve;

[0009] At least one boss is used for installing a liquid injection hole aluminum sheet.

[0010] Preferably, four bosses are provided;

[0011] The explosion-proof valve is located at the center of the end face of the aluminum shell;

[0012] The positive end cover and the negative end cover are located on both sides of the explosion-proof valve;

[0013] The liquid injection hole aluminum sheet is located outside the positive end cover or the negative end cover.

[0014] Preferably, the positive end cover and the negative end cover are provided with a stepped structure, which is matched with the installation holes formed on the bosses.

[0015] Preferably, the positive end cover and the negative end cover are welded to the aluminum shell.

[0016] Preferably, a stacked core is installed in the aluminum shell.

[0017] Preferably, an aluminum plate is welded to one end of the aluminum shell away from the boss.

[0018] Preferably, a stepped surface is provided at the joint of the aluminum plate and the aluminum shell.

[0019] Preferably, the explosion-proof valve is located at the intersection of the longitudinal center line and the transverse center line of the aluminum shell;

[0020] The aluminum sheet of the liquid injection hole is located on the transverse center line;

[0021] The mounting holes are symmetrically arranged with the longitudinal center line as the center and are located on one side of the transverse center line.

[0022] Preferably, the explosion-proof valve is located at the intersection of the longitudinal center line and the transverse center line of the aluminum shell;

[0023] The aluminum sheet of the liquid injection hole is located on the transverse center line;

[0024] The two mounting holes are located on both sides of the longitudinal center line and are arranged diagonally.

[0025] Preferably, the explosion-proof valve is located at the intersection of the longitudinal center line and the transverse center line of the aluminum shell;

[0026] The aluminum sheet of the liquid injection hole is located on the transverse center line;

[0027] The mounting holes are symmetrically arranged with the longitudinal center line as the center and are located on the transverse center line.

[0028] Advantages of the present utility model:

[0029] 1. In the present utility model, a plurality of bosses are formed by stamping on the end face of the aluminum shell, and the spaces required for the explosion-proof valve and the aluminum sheet of the liquid injection hole are all expanded outward in the form of these bosses, so that the internal space of the aluminum shell is increased, and the installation space of the stacked core or wound core will not be affected;

[0030] 2. In the present utility model, the positive end cover and the negative end cover are installed on one end face of the aluminum shell, which is beneficial to the installation of the long pole ear.

[0031] Other features and advantages of the present utility model will be described in the subsequent specification, and some of them will become obvious from the specification or can be understood by implementing the present utility model. The purpose and other advantages of the present utility model can be achieved and obtained through the structure pointed out in the specification and the drawings. Brief Description of the Drawings

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 Shows an exploded view of an integrated aluminum shell cover plate of the present invention;

[0034] Figure 2 Shows a structural diagram of the positive end cover and the negative end cover of the present invention;

[0035] Figure 3 Shows a structural schematic diagram of the aluminum plate of the present invention;

[0036] Figure 4 Shows a first implementation structural diagram of the present invention;

[0037] Figure 5 Shows a second implementation structural diagram of the present invention;

[0038] Figure 6 Shows a third implementation structural diagram of the present invention.

[0039] In the figure: 1. Positive end cover; 2. Negative end cover; 3. Aluminum shell; 301. Mounting hole; 302. Explosion-proof valve; 303. Aluminum sheet for liquid injection hole; 4. Stacked core; 5. Aluminum plate. Detailed implementation manners

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0041] An integrated aluminum shell cover plate includes a positive end cover 1, a negative end cover 2, and an aluminum shell 3. One end face of the aluminum shell 3 is provided with a plurality of convex platforms formed by stamping; at least two convex platforms have mounting holes 301 on their surfaces, and the mounting holes 301 are used to mount the positive end cover 1 and the negative end cover 2; at least one convex platform is used to mount the explosion-proof valve 302; at least one convex platform is used to mount the aluminum sheet 303 for the liquid injection hole.

[0042] It should be noted that after the convex platform formed by stamping is arranged on the surface of the aluminum shell 3, the space can be expanded outwards, thus increasing the internal space of the aluminum shell 3. In addition, the convex platform structure also enhances the structural strength of the aluminum shell 3.

[0043] As Figure 1 shown, there are four convex platforms. Among them, the explosion-proof valve 302 adopts a waist-shaped structure and is located at the center of the end face of the aluminum shell 3. The positive end cover 1 and the negative end cover 2 adopt a square structure and are located on both sides of the explosion-proof valve 302. The liquid injection hole aluminum sheet 303 adopts a circular structure and is located outside the positive end cover 1 or the negative end cover 2. In addition, a stacked core 4 is installed in the aluminum shell 3, and an aluminum plate 5 is welded to one end of the aluminum shell 3 away from the convex platform, and a stepped surface is arranged at the joint of the aluminum plate 5 and the aluminum shell 3.

[0044] It should be noted that during the processing, the convex platform can be first punched out at the bottom of the aluminum shell 3, and then a square installation hole 301 can be punched out on the basis of the convex platform, which can increase the strength around the installation hole 301.

[0045] As Figure 2 shown, the positive end cover 1 and the negative end cover 2 are provided with a stepped structure and are matched with the installation hole 301 opened on the convex platform. Moreover, the positive end cover 1 and the negative end cover 2 are welded to the aluminum shell 3.

[0046] It should be noted that the positive end cover 1 and the negative end cover 2 are divided into a substrate and a terminal. The size of the substrate is only a little larger than that of the terminal, and a step is arranged on the substrate.

[0047] As Figure 3 shown, the aluminum plate 5 is matched with the aluminum shell 3 through the stepped surface and is connected by laser welding, which can improve the sealing effect at the joint.

[0048] Furthermore, since the installation hole 301, the explosion-proof valve 302 and the liquid injection hole aluminum sheet 303 in the present utility model are arranged in cooperation with the convex platform, when the stacked core 4 is assembled, the installation hole 301 also has a certain role in positioning the positive and negative electrodes. The following combines Figures 4 - 6 to illustrate several layout schemes.

[0049] As Figure 4 shown, where A is the longitudinal center line and B is the transverse center line. The explosion-proof valve 302 is located at the intersection of the longitudinal center line and the transverse center line of the aluminum shell 3; the liquid injection hole aluminum sheet 303 is located on the transverse center line; the installation holes 301 are symmetrically arranged with the longitudinal center line as the center and are located on one side of the transverse center line.

[0050] As Figure 5 shown, the explosion-proof valve 302 is located at the intersection of the longitudinal center line and the transverse center line of the aluminum shell 3, the liquid injection hole aluminum sheet 303 is located on the transverse center line; the two installation holes 301 are located on both sides of the longitudinal center line and are arranged diagonally.

[0051] As shown Figure 6 in the figure, the explosion-proof valve 302 is located at the intersection of the longitudinal center line and the transverse center line of the aluminum shell 3; the liquid injection hole aluminum sheet 303 is located on the transverse center line; the mounting holes 301 are symmetrically arranged with the longitudinal center line as the center and are located on the transverse center line.

[0052] It should be noted that from Figures 4 - 5 the structural layout, it can be seen that the positive end cap 1 and the negative end cap 2 are concentrated on both sides of the explosion-proof valve 302, which is beneficial to the installation of the long tab.

[0053] During assembly, first, the positive end cap 1 and the negative end cap 2 are laser welded and fixed to the tab that is centered and closed. Then, together with the stacked core 4 or the wound core, they are integrally installed into the aluminum shell 3, and the end caps are exposed from the corresponding mounting holes 301 of the aluminum shell 3. The surface around the bottom hole of the aluminum shell 3 just fits with the substrate step surfaces on the positive end cap 1 and the negative end cap 2. At the same time, the purpose of the draft design of the vertical surface at the substrate step is also to facilitate the assembly between the end cap and the aluminum shell 3. After assembly, laser welding is performed around the holes of the aluminum shell 3 to fix the end cap and the aluminum shell 3 and simultaneously play a sealing role.

[0054] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated aluminum shell cover, characterized in that: It comprises a positive terminal cover (1), a negative terminal cover (2) and an aluminum shell (3); One end surface of the aluminum shell (3) is provided with a plurality of bosses formed by stamping; At least two boss surfaces are provided with mounting holes (301), and the mounting holes (301) are used to mount the positive terminal cover (1) and the negative terminal cover (2); At least one boss is used to mount an explosion-proof valve (302); At least one boss is used to mount the injection hole aluminum sheet (303).

2. The one-piece aluminum shell cover according to claim 1, characterized in that: The bosses are provided with four; The explosion-proof valve (302) is located at the center of the end surface of the aluminum shell (3); The positive terminal cover (1) and the negative terminal cover (2) are located on both sides of the explosion-proof valve (302); The injection hole aluminum sheet (303) is located outside the positive terminal cover (1) or the negative terminal cover (2).

3. The one-piece aluminum shell cover according to claim 2, characterized in that: The positive terminal cover (1) and the negative terminal cover (2) are provided with a step structure, which cooperates with the mounting hole (301) provided on the boss.

4. The one-piece aluminum shell cover according to claim 2, characterized in that: The positive terminal cover (1) and the negative terminal cover (2) are connected to the aluminum shell (3) by welding.

5. The one-piece aluminum shell cover according to claim 2, characterized in that: A stacked core (4) is installed in the aluminum shell (3).

6. The one-piece aluminum shell cover according to claim 2, characterized in that: An aluminum plate (5) is welded to one end of the aluminum shell (3) away from the boss.

7. The integrated aluminum shell cover according to claim 6, characterized in that: A step surface is provided at the matching position between the aluminum plate (5) and the aluminum shell (3).

8. The integrated aluminum shell cover according to any one of claims 2 to 7, characterized in that: The explosion-proof valve (302) is located at the intersection of the longitudinal centerline and the transverse centerline of the aluminum shell (3); The injection hole aluminum sheet (303) is located on the transverse center line; The mounting holes (301) are symmetrically arranged with the longitudinal center line as the center, and are located on one side of the transverse center line.

9. The integrated aluminum shell cover according to any one of claims 2 to 7, characterized in that: The explosion-proof valve (302) is located at the intersection of the longitudinal centerline and the transverse centerline of the aluminum shell (3); The injection hole aluminum sheet (303) is located on the transverse center line; The two mounting holes (301) are located on both sides of the longitudinal center line and are arranged diagonally.

10. The integrated aluminum shell cover according to any one of claims 2 to 7, characterized in that: The explosion-proof valve (302) is located at the intersection of the longitudinal centerline and the transverse centerline of the aluminum shell (3); The injection hole aluminum sheet (303) is located on the transverse center line; The mounting holes (301) are symmetrically arranged with the longitudinal center line as the center and are located on the transverse center line.

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